Machine for paving streets



Dec. 26, 1939.

H. BUHRMANN 2,184,906 MACHINE FOR PAVING STREETS Filed Nov. 30, 1937 2Sheets-Sheet 1 .l'nvenfom Dec. 26, 1939. BUHRMANNI I MACHINE FOR PAVINGSTREETS Filed Nov. 30, 1937 2 Sheets-Sheet 2 O 0 o k o a II/ 0 O Aim/Patented Dec. 26, 1939 unit's stares MACHINE? FO-Rl PAVING STREETS IHeinrichBiihrmann, .Meererbusch,. near Dusseldorf, Germany ApplicationtNovember In 1 Germany 6' Claims.

This invention relates? toa'device for laying paving stones,particularlyartifioial stones.

Paving by hand requires'relatively much" time, is quite expensiveand:fails to produce thedesirable or necessary uniformity in" laying.Furthermore, it is difiiculttoifind pavers. for'larger jobs.

The invention eliminates these troubles by successively arranging one,frame extending over the entire width of the street orroad, o1" over aportion thereof, an'd'being movable in the longitudinal direction of thestreet to be paved, a device for plaoingthe embedding'mas's onthe bottomballasting or metal layer and-planing the mass, a device for layingthestones intothe eme bedding mass in a regular and accurate manner, and adevice for pressing orramming the stones. Paving is thus divided intothree'phases, and the corresponding operations can be carried out eithersimultaneously or successively by the new device;

By way of example, theinventionis illustrated in the accompanyingdrawings, in which Figure 1 is a vertical section showing thedevic'e'inelevatioir as seen from" the street; Fig. 2"is'a plan view of Fig; i;Fig. 3Iis' a cross section of the ramming device; Fig. 4', a partialtopview thereof; Fig. 5, a section'on the line 5-5, of Fig; 1'; Fig. 6",a sectiononthe' line B-6, ofFig; 3; and

Fig. l. a perspective vi'ew ofthepavementshowing the three workingphases.

Referring to' the drawings, the device: comprises a iramemovableirrthenlongitudinal'direction of the street to be paved and having two sideframes l provided with thewh'eels- 2' and connected by the crossstruts'3. The frame I, 2, 3 preferably extends over the? entire. widthof the street and can be moVed aloIIgthestreet on rails 23; The devicefor putting Ol'i-"ithG' embedding mass comprises-a funnel-shapedreceptacle lhaving smooth walls on all" sides'and movable in atransversedirection*on' thewheels '5. The'hopper or receptacle dis movedalon the rails ruby-hand, or by'any suitablemeans (not shown). Thereceptacle t'contains the embeddingv material it; such as cement mortar,bitumen mortar, sand, etc'., and during operation discharges itscontents in atransverse direction upon the bed or road metal 5. A-bar G'adjustable as the receptacle The bar 6' may-"be adjustable as to heightin any suitable manner. As: shown, it is mounted on a pair ofsubstantially vertical supports li which are slidably connected to theheight serves for roughly leveling; the embedding material 25 after. itis. delivered from- 30, 1937; Serial No. 177,382 December 3, 1936 (Cll'.94-47) frame i of the receptacle Any suitable means (notshown) formaintaining the supports 6 in anadjuste'd position may be used. Thehopper l may. be connected with a mixing machine (not shovm) which formsno part of my invention, 5 for the mass. The receptacle 4 can be movedon exciiangeablerails 26 whose top side corresponds to the cross sectionof the street so as to adapt the mass M to the sectional profile of thestreet.

For supplying the stones 3 a manually or mechanically operated beltconveyor ill or a slide (not shown) is employed which may be providedwith bottom rolls. Nearthe conveyor 21 a narrow platform 'idextends fromone side frame to the other for the accommodation of the workers. Besidethe platform 28 a frame 9 is dis-' posed andprovided with several rowsof staggered compartments or cells Hlwhich are open above and below andinto which the stones 8 fit with some play. The upper and lower side ofthe frame 9 is. adapted to the profile of the street to -be paved. Theframe 9 is suspended from wirenropes: l 5' which can be raisedandlowered andare guided Lover sheaves l2 on the side frames l. Thedrive for the sheaves lzconsists for instance of bevel gears it whichare turned by means of a crank, lever, etc. to raise or lower the frame9; When the frame 83 is lowered, the stones 8 are inserted in the cellsill, the walls of which correspond to the joints, and are thus placed infinal position on theroad metal 5. After the filling of the cells ID theframe 9 is raised, moved farther along the road bed and lowered againonto the ballasting 5 so as to be -5; indirect connection with thepreviously laid stones.

The device for pressing or ramming the stones comprises for instance aplurality of wooden ramming planks M which by means of longitudinalirons 29- and transverse reinforcements 30 can be combined to form aplate which at its ends is held by carrying plates it. The carryingplates i5 are guided in a vertical frame it on the side portions l ofthe movable frame and. with their rolls E'i'moveon a slide it possessinginclined cam surfaces 2i and moved forward and backward by a screwspindle It and a driving Wheel 26. During forward motion of the slide E8the rolls ii of the carrying plates i5 engage the inclined cam surfaces2| of the slide l8, whereby the plates l5 and thus the pressure membersI dare lifted, whilst rap-id return motion of theispindleificauses therolls l! to slide ofi fromtheinclined cam surfaces 2| so quickly thatthe pressure members I4 drop suddenly and strike the rows of stones.Motion of the ramming planks can be effected also by spindles. Accordingto the nature of the stones and embedding material to be used, singleplanks and Stampers or suitable combinations of both may be employed.

The device functions as follows:

After the embedding material 24 has been placed on the ballasting 5 bythe receptacle -4 moving on the frame I, 2, 3 in the transversedirection of the street and the member 6 has preparatorily planed thematerial the frame I, 2, 3 is moved in the longitudinal direction of thestreet to the extent of the width of the paving section to be producedwhile simultaneously an adjustable planer 22 extending over the entirewidth of the street completes the planing of the embedding mass 24. Theframe 9 is then lowmass 24, and the artificial stones 8 disposed on thebelt conveyor 27 are it of the frame 9. In the meantime, embeddingmaterial is spread over the adjacent portion of the bottom ballastingand preparatorily planed by the member 6. When filled with stones theframe 9 is raised again and the frame I, 2, 3 moved forward to theextent of the width of the section to be paved, so that the rammingdevice M is disposed above the stones 8 placed in the embedding mass 25.During motion of the frame I, 2, 3 the preparatorily planed section isfinished again by the planer 22, so that the frame 9 will be locatedabove the newly finished section and the previously laid rows of stonesare rammed or pressed into the embedding material 24 by the pressuremember 14 and the stones thus finally set, as indicated in Fig. 7.During the ramming operation fresh stones are placed in the lowered cellframe 9 and in the connecting section of the street embedding materialis spread out and subjected to preliminary planing. The frame I, 2, 3 isthen advanced again the Width of a section, and the three phases of thepaving process can thus be continued and carried out by means of themechanical equipment.

I claim:

1. A device for paving a street or the like with paving stones or thelike, comprising a frame extending over at least a part of the width ofsaid street, means mounting said frame for movement over said streetlongitudinally thereof, a hopper carried by said frame for applyingembedding material to said street, means mounting said hopper for backand forth movement transs'aid frame and street, means carried saidhopper is moved across said frame to deliver embedding material to saidstreet, a guide frame comprising at least one transverse row of stoneguiding open cells carried by said frame rearwardly of said hopper,means for lowering and raising said guide frame to and from a positionon said embedding material, said guide frame comprising means forregularly and accurately laying a batch of paving stones in saidembedding material when said guide frame is in the lowered position, andmeans carried by said frame rearembedding material.

2. A device for paving a street of the like with paving stones or thelike, comprising a frame extending over at least a part of the width ofsaid street, means mounting said frame for movement over said streetlongitudinally thereof, a hopper carried by said frame for applyingembedding material to said street, a guide frame comprising at least onetransverse row of stone guiding open cells carried by said frame rearwarly of said hopper,

on said embedding material, comprising means for regularly andaccurately laying a batch of paving stones in said embedding materialwhen said guide frame is in the lowered position, means carried by saidframe rearwardly of said guide frame for simultaneously tamping all ofsaid batch of laid stones into said embedding material.

3. A device for paving a street or the like with street, means mountingsaid frame for movement over said street longitudinally thereof, ahopper carried by said frame for applying embedding for said embeddingmaterial extending transversely of said street, said finishing planerbeing carried by said frame between said hopper and said guide frame.

4. A device for paving a street or the like with paving stones or thelike, comprising a frame extending over at least a part of the width ofsaid street, means mounting said frame for movement operative topreparatorily plane said material in a transverse direction as saidhopper is moved across said frame to deliver emmaterial when said guideframe is in the lowered position, and means carried by said framerearwardly of said guide frame for simultaneously of said batch of laidstones into said said tamping means instones, and means for actuatingsaid cams.

5. A device for paving a street or the like with paving stones or thelike, comprising a frame tending over at least a part of the width ofsaid street, means mounting said frame for movement over said streetlongitudinally thereof, a hopper carried by saidframe material to saidstreet, means mounting said hopper for back and forth movementtransversely of said frame and street, means carried by said hopper andoperative to preparatorily' plane said material in a transversedirection as said hopper is moved across said frame to deliver embeddingmaterial to said street, a guide frame comprising at least onetransverse row of stone guiding open cells carried by said hopper, meansfor lowering and raising said guide frameto and from a position on saidembedding material, said guide frame comprising means for regularly andaccurately laying paving stones in said embedding material when saidguide frame is in the lowered position, means carried by said frameframe for tamping said laid stones into said embedding material, afinishing bedding material extending transversely of said street, saidfinishing planer being carried by said frame between said hopper andsaid guide frame, an operators platform on said frame adjacent saidguide frame, and means carried by said extending over at least a part ofthe width of said street, means mounting said frame for movement oversaid street longitudinally thereof, a hopper carried by said frame forapplying embedding material to said street, means mounting said hopperfor back and forth movement transversely of said frame and street, meanscarried by said hopper and operative to preparatorily plane saidmaterial in a transverse direction as said hopper is moved across saidframe to deliver embedding material to said street, a guide framecomprising at least one transverse row of stone guiding open cellscarried by said frame rearwardly of said hopper, means for lowering andraising said guide frame to and from a position on said embeddingmaterial, saidguide frame comprising means for regularly and accuratelylaying a batch of paving stones in said embedding material when saidguide frame is in the lowered position, means carried by said framerearwardly of said guide frame for simultaneously tamping all of saidbatch of laid stories into said embedding material, a finishing planerfor said embedding material extending transversely of said street, saidfinishing planer being carried by said frame between said hopper andsaid guide frame, and means carried by said frame for delivering stonesto the vicinity of said guide frame.

6. A device for paving a street or the like with paving stones or thelike, comprising a frame explatform.

HEINRICH BUHRMAN N.

for applying embedding rearwardly of said guide frame rearwardly of saidplaner for said emframe for delivering stones to the vicinity of said

